What is a responsibility matrix?
A responsibility matrix maps the information a project needs against the teams that produce it. ISO 19650-2 asks for two: a high-level responsibility matrix in the tender response, showing which team takes on which information, and a detailed responsibility matrix after appointment, setting out who produces each piece of information, when, and to what level. The detailed matrix is what each team's TIDP is built from.
What's in the responsibility matrix template
- The deliverables, down the side: the information containers or document sections the project needs.
- The task teams and roles, across the top.
- R, A, C or I in each cell - with exactly one A on every row.
- The stage or milestone each deliverable belongs to, and its level of information need.
RACI: what each letter means
Responsible does the work. Accountable answers for it - one team per deliverable, never two. Consulted is asked before it's done. Informed is told once it's done. Most problems come from rows with no A, or with two. Our RACI matrix examples show filled-in tables for construction and BIM projects, and creating a responsibility matrix covers the BIM-specific roles.
Why the matrix stops working, and the fix
A matrix in a BEP appendix is a picture of what someone hoped for at the tender. Put the roles on the real tasks and document sections instead, get each team to agree its part, and it becomes a record of who owns what. That's the job on the RACI use case, with the Episode 2 replay. The UK BIM Framework's guidance on the delivery phase explains the parties and teams behind it.




